	<script>	
		var pretime = "2021-11-26 10:38:16";
		
		var minute = 1000 * 60;
		var hour = minute * 60;
		var day = hour * 24;
		var halfamonth = day * 15;
		var month = day * 30;

		getDate(pretime);
		
		setInterval(function() {
		    getDate(pretime);
		}, 60000);
		
		function getDate(dateTimeStamp){
			
			if(dateTimeStamp==undefined){
				
				return false;
			}else{
				dateTimeStamp = dateTimeStamp.replace(/\-/g, "/");
				
				var sTime = new Date(dateTimeStamp).getTime();
				
				var now = new Date().getTime();
				
				var diffValue = now - sTime;
				var dayC =diffValue/day;
				var hourC =diffValue/hour;
				var minC =diffValue/minute;
				
        if(dayC>=1){
					console.log(parseInt(dayC) +"天前")
				}
				else if(hourC>=1){
					console.log(parseInt(hourC) +"个小时前")
				}
				else if(minC>=1){
					console.log(parseInt(minC) +"分钟前")
				}else{
					console.log("刚刚")
				}
			}
			
		}
	</script>
